Almost all of them have European surnames, but only ~20% of them have a European ancestor. If you are white, chances are good one of your ancestors came from France, or used a French surname to fool the authorities.
1 AC, or alternating current means the electrical current is alternating directions in a repetitive pattern.  AC is created by generators in power plants, and other sources. This AC current is delivered to our homes and businesses by the power lines we see everywhere.
1. something that flows. 2. specifically, electricity transmitted through a circuit. alternating current a current that periodically flows in opposite directions; its amplitude fluctuates as a sine wave. convection current a current caused by movement by convection of warmer fluid into an area of cooler fluid.